I have a little tip for decent Dungeon Fighter Online gold making in the late 20s early 30s for horde members though Alliance can do it too.
I was at Tarren Mill and I picked up all of my quests. One was to kill the grey bears for their tongues, another to kill the cats around there for a claw. I am a skinner and I also had just trained a new pet. These quests were just what I needed.
While killing these guys, I noticed that their drops were selling really good compared to what I had been getting previously. I would run out and kill until my inventory was full. I got good skins and good drops plus a few of each quest item. I found I was actually happy when I filled up, because I was selling and buy Dungeon Fighter gold after selling. And you can kill tons of these within a minute or two travel time of Tarren Mill, so selling was easy to do.